Abstract
Thyroid imaging using technetium-99m as pertechnetate ((TcO4-)-Tc-99m) was carried out in five healthy, euthyroid and 37 hyperthyroid cats using both pinhole and parallel-hole collimators. Images of greater resolution, necessary to distinguish bilateral lobe involvement, were obtained using the pinhole collimator. Per cent thyroid (TcO4-)-Tc-99m uptake was calculated in each cat and was significantly (P < 0.001) higher in hyperthyroid compared with euthyroid cats. In the hyperthyroid cats, per cent thyroid uptake was significantly correlated with serum total thyroxine (T4) and triiodothyronine (T3) concentrations. Per cent thyroid (TcO4-)-Tc-99m Uptake is increased in feline hyperthyroidism and may be calculated using a pinhole collimator alone at the time of qualitative assessment of the extent of thyroid tissue involvement.
| Original language | English |
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| Pages (from-to) | 313-320 |
| Number of pages | 8 |
| Journal | Veterinary Radiology & Ultrasound |
| Volume | 33 |
| Issue number | 5 |
| Publication status | Published - 1992 |